Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
6457453Factored
FactorDigitsBitsDate
49757872611783114382606494890950607246976742138.52022-01-03 18:55:38
ECM
DigitsB1Curves
25500006 / 280
Estimated T-Level: 20.1
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Bad1999-04-23Adam Cook235D38CD81FD057F0
Verified (Factored)2001-04-01Alan Vidmar6D9FC058318AAFF33762126
Verified (Factored)2001-08-12John A. Churchill,Sr6D9FC058318AAFF3551525
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2022-01-09kutens1542986F1FF4A94C1616128153
P-1 factors
DateFactorB1B2
2022-01-034975787261178311438260649489095060724697671000000880387200
History
DateUserTypeResult
2022-01-09ArgentiumCERT
PRP Certification
Proof certified good
2022-01-09kutensC-PRP
M6457453/497578726117831143826064948909506072469767 : 1542986F1FF4A94C
PRP proof power = 7
PRP: Verified
Proof certified good
2022-01-03Architects CubedF-PM1
Factor: 497578726117831143826064948909506072469767 / (P-1, B1=1000000, B2=880387200)
2021-10-08SRBaseNF
no factor from 2^71 to 2^72
2021-08-16SRBaseNF
no factor from 2^70 to 2^71
2021-03-09takahashiNF
no factor from 2^69 to 2^70
2020-05-20takahashiNF
no factor from 2^68 to 2^69
2018-06-06ramgeisNF
no factor from 2^67 to 2^68
2016-04-08Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-10-25snme2pm1NF
no factor from 2^65 to 2^66
2014-09-10NesowaNF-PM1
B1=395000, B2=9973750, E=12
2014-08-06lycornNF
no factor from 2^64 to 2^65
2014-08-02NesowaNF
no factor from 2^63 to 2^64